Pressing mechanism for sign units



W. F. HEEREN.

FRESSI'NG MECHANISM FOR S lGN UNITS.

' APPLICATION FILED JULY I6, x9211 1,417,993; Piztented May 30,192 2.

,J 119.10 /3 /4 a; 1 II Ill!" mllllx llllllilll I the ends by transverserivets or bolts These may be curved in the manner shown when it isdesired to give a permanent curved set to the sign unit, as whenused onthe front of a cap, or may be flat if desired.

F or the purpose of forming a close contacting engagement with the watercooled base 9 and of amplifying the heat absorbing area for quickcooling, the upper plate 24: is bent is tightly secured to the watercooled anvil by pins 29 inserted through suitable openings in the flange27 and in the front and back of the block, as shown.

As thus constructed, the machine is used by inserting the compound sign.unit between the heater and the pressing block 17, the contacting facesbeing properly formed for close engagement. Block 2 is then loweredunder the considerable pressure of the toggle mechanism and current isturned on and continued for a definite period, say one minute, thepressure being also maintained. The heat effects a permanent setting ofthe sign unit and a fusing of the parts, so that it becomes apractically integral or continuous sheet, with the inserted elements 14Lthus permanently combined with the base 13. The current is then turnedoff and cold water is circulated through the anvil 9, by which the heatis quickly absorbed and the several parts and the sign unit are cooled.The effect of the sudden change in temperature is to complete thepermanent setting of the unit and to impart an added polish to thesurface.

The pressing head 2 is then raised, the unit is removed, and another isinserted and the operation just described is repeated.

The advantages of the invention will be readily understood andappreciated by all those familiar with the art involved. It iscomparatively simple and economical in construction, ensures a highstandard of quality v to the sign units operatedfupon, and because ofthe minimum time involved, greatly increases the out-put over othermethods now in use.

lVhat I claim is:

1. A pressing machine having a water cooled anvil, a relatively thinseparate casing mounted on the upper surface of said anvil, andincluding spaced apart upper and lower metal plates, a relatively thinelectrical heating means interposed between the plates, the lower platebeing in intimate con- ;tact with the top of the anvil and the upperplate providing a pressing surface, and a pressing block having meansfor exerting pressure thereon.

2.;A pressing machine provided with a water cooled anvil, anelectrically heated support thereon having side members in embracingengagement with the anvil, a superimposed pressing block adapted toengage and press an intervening sign unit downwardly against theelectrically heated support, and means, for exerting and maintainingpressure upon the block. i

3. A. heating and cooling anvil support for a pressing machine of theclass described comprising an anvil having a series of water circulationports therethrough, means for establishing a water circulationtherethrough, a superimposed heater consisting of an outer plate havingdownwardly extending flanges closely embracing the anvil, and electricalresistance members enclosed within said plate between it and the anvil.

4. A heating andcooling anvil support for a pressing machine of theclass described comprising an anvil having a series of water circulationports therethrough, means for establishing a water circulationtherethrough, a superimposed heater consisting of an outer plate havingdownwardly extending flanges closely embracing the anvil, electricalresistance members enclosed within said plate between it and the anvil,and asuperimposed thin supporting plate.

5. In combination with a water cooled anvil, a superimposed heatingsupport con sisting of an upper plate having downwardly extendingflanges closely embracing the anvil, a lower plate, an interveningelectrical resistance conductor, and an associated packing of water.glass or the like.

6. In combination with a water cooled anvil, a superimposed heatingsupport consisting of an upper plate having downwardly extending flangesclosely embracing the anvil, a lower plate, an intervening electricalresistance conductor, an associated packing of water glass or the like,and outer sheets of mica between the resistance and the upper and lowerplates respectively.

7. In combination with a water cooled anvil, a superimposed heatingsupport consisting of an upper plate having downwardly extending flangesclosely embracing the anvil, a lower plate, an intervening electricalresistance conductor, an associated packing of water glass or the like,and means connecting the upper and lower plates whereby to hold theintervening members in position.

In testimony whereof I hereunto my signature.

WALTER it HEEREN.

